INDUSTRY COMPONENT

Fillers

Fillers are inert materials added to silicone resin to modify properties like viscosity, strength, and cost.

Component Specifications

Definition
Fillers in silicone resin are particulate or fibrous materials incorporated into the resin matrix to enhance mechanical properties, reduce shrinkage, improve thermal stability, or lower production costs. Common fillers include silica, calcium carbonate, and alumina. They are typically surface-treated to ensure compatibility with the silicone polymer.
Working Principle
Fillers are dispersed into the silicone resin during compounding. They physically interact with the polymer matrix, increasing viscosity, reinforcing structure, and modifying thermal and electrical properties. Surface treatment improves wetting and bonding.
Materials
Fumed silica, precipitated silica, calcium carbonate, alumina, quartz, glass fibers, carbon black.
Technical Parameters
ParameterTypical rangeNotes & selection driver
PH6-8
Particle Size0.01-100 µm
Moisture Content<0.5%
Specific Surface Area50-400 m²/g

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 3262, ASTM D6050

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Inhalation of fine particles
  • Skin irritation from untreated fillers
  • Incompatibility leading to phase separation
FMEA Triads
Trigger: Inadequate dispersion
Failure: Poor mechanical properties
Mitigation: Use high-shear mixing and surface-treated fillers
Trigger: High moisture content
Failure: Foaming during curing
Mitigation: Dry fillers before use

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
Particle size ±10%
Test Method
Laser diffraction per ISO 13320

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Fillers

Manufacturer profiles associated with Fillers.

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Frequently Asked Questions

What is the purpose of fillers in silicone resin?

Fillers modify viscosity, improve mechanical strength, reduce cost, and enhance thermal stability.

Which filler is most common for silicone resin?

Fumed silica is widely used due to its high surface area and reinforcing effect.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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